diff --git a/apps/overlays/au-syd1/cert-manager/kustomization.yaml b/apps/overlays/au-syd1/cert-manager/kustomization.yaml
index 4e75143..32bba4c 100644
--- a/apps/overlays/au-syd1/cert-manager/kustomization.yaml
+++ b/apps/overlays/au-syd1/cert-manager/kustomization.yaml
@@ -8,7 +8,7 @@ resources:
 helmCharts:
   - name: cert-manager
     repo: https://artifactapi.k8s.syd1.au.unkin.net/api/v1/virtual/helm
-    version: "v1.19.2"
+    version: "v1.20.2"
     releaseName: cert-manager
     namespace: cert-manager
     valuesFile: values.yaml
diff --git a/apps/overlays/au-syd1/cert-manager/values.yaml b/apps/overlays/au-syd1/cert-manager/values.yaml
index 16a91a0..7dd96da 100644
--- a/apps/overlays/au-syd1/cert-manager/values.yaml
+++ b/apps/overlays/au-syd1/cert-manager/values.yaml
@@ -1,6 +1,11 @@
 crds:
   enabled: true
 
+config:
+  apiVersion: controller.config.cert-manager.io/v1alpha1
+  kind: ControllerConfiguration
+  enableGatewayAPI: true
+
 replicaCount: 2
 
 resources: